<template>

  <el-container class="home_container">
    <el-header>
      <div>
        <img src="../assets/heima.b5a855ee.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
      <el-aside :width="isCollapse?'64px':'200px'">
        <div class="toggle-btn" @click="toggleCollapse">|||</div>
        <el-menu
            background-color="#333744"
            text-color="#fff"
            active-text-color="#409eff"
            unique-opened
            :collapse="isCollapse"
            :collapse-transition="false"
            router
            :default-active="activePath"
        >
          <!--          一级菜单-->
          <el-submenu :index="item.id+''" v-for="item of menuList" :key="item.id">
            <!--            一级菜单模板区域-->
            <template slot="title">
              <i :class="iconsObj[item.id]"></i>
              <span>{{item.authName}}</span>
            </template>
<!--            二级菜单区域-->
            <el-menu-item
                :index="`/${subItem.path}`"
                v-for="subItem in item.children "
                :key="subItem.id"
                @click="saveNavState('/'+subItem.path)"
            >
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>

        </el-menu>
      </el-aside>
      <el-main>
<!--        路由占位符-->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>

</template>

<script>
export default {
  name: "Home",
  data() {
    return {
      // 左侧菜单
      menuList:[],
      // 图标对象
      iconsObj:{
        '125':'iconfont icon-user',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao'
      },
      // 定义菜单项是否折叠
      isCollapse:false,
      // 定义激活链接的路径
      activePath:''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath',)
  },
  methods: {
    logout() {

      // 清空token
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 点击按钮切换菜单折叠与展开
    toggleCollapse(){
        this.isCollapse = !this.isCollapse
    },
    // 保存链接状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath = activePath
    },
    // 获取所有菜单
    async getMenuList() {
      const {data:res} = await this.$http.get('menus')
      if(res.meta.status !==200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
      // console.log('res',res)


    }
  }
}
</script>

<style lang="less" scoped>
.home_container {
  height: 100%;
}

.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  color: #ffffff;
  font-size: 20px;

  & > div {
    display: flex;
    align-items: center;

    span {
      margin-left: 15px;
    }
  }
}

.el-aside {
  background-color: #333744;
}
.el-menu{
  border-right: none;
}
.el-main {
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-btn{
  background-color: #4a5064;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 15px;
  color: #ffffff;
  letter-spacing: 0.2em;
  cursor:pointer;
}
</style>
